<!--
 * @Author: spycym
 * @Date: 2022-07-14 11:17:56
 * @LastEditTime: 2022-07-14 20:23:50
 * @LastEditors: spycym
 * @Description: 
 * 不要随便动我的代码哟!
-->
<template>
  <div class="todo-footer" v-show="total">
    <label>
      <input type="checkbox" v-model="isAll" />
    </label>
    <span>
      <span>已完成{{ doneTotal }}</span> / 全部{{ total }}</span
    >
    <button class="btn btn-danger" @click="clearAll">清除已完成任务</button>
  </div>
</template>

<script>
export default {
  name: "todoFooter",
  props: ["todos"],
  computed: {
    total() {
      return this.todos.length;
    },
    doneTotal() {
      return this.todos.reduce((pre, todo) => {
        return todo.done ? pre + 1 : pre;
      }, 0);
    },
    isAll: {
      get() {
        return this.total === this.doneTotal;
      },
      set(value) {
        this.$emit("isAllDone", value);
      },
    },
  },
  methods: {
    clearAll() {
      this.$emit("clearAllTodo");
    },
  },
};
</script>

<style scoped>
/*footer*/
.todo-footer {
  height: 40px;
  line-height: 40px;
  padding-left: 6px;
  margin-top: 5px;
}

.todo-footer label {
  display: inline-block;
  margin-right: 20px;
  cursor: pointer;
}

.todo-footer label input {
  position: relative;
  top: -1px;
  vertical-align: middle;
  margin-right: 5px;
}

.todo-footer button {
  float: right;
  margin-top: 5px;
}
</style>